Mutual Screw & Supply

0.139" CS X 1.421" ID Buna-N Nitrile O-Rings | AS568-221 | Dash 221 | 90 Durometer (400 / Pkg.)

0.139" CS X 1.421" ID Buna-N Nitrile O-Rings | AS568-221 | Dash 221 | 90 - Main image
$36.08 $54.66 In stock

Buna-N Nitrile o-rings in AS568-221, 1.421" inner diameter by 0.139" cross-section. Service range -40°F to +250°F (-40°C to +121°C). Also known as NBR, Buna-N, Chemigum, Hycar, Perbunan.

Specifications

  • Product type: O-Ring
  • Material: Buna-N Nitrile
  • AS568 dash size: 221
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 1.421" (36.09 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 400 per package
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Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Ava E. ★★★★★

The 90 durometer hardness is exactly what I needed for a high-pressure seal, and the batch of 400 means I won't run out for years. Tolerances were spot-on when I checked a few with calipers, and they slid into the grooves without any twisting. Temperature range covers our hot and cold cycles, so I'm

David U. ★★★★★

Needed a batch of these for a pneumatic project and the 90 durometer feels just right. Fit perfectly in the groove, and they arrived well-packed without any deformation.

Ava E. ★★★★★

Replaced a worn seal in a hydraulic fitting and these 90-durometer rings held up fine so far, the 1.421" ID is right on spec. Pack of 400 is a lot, but the price per ring makes it worth having spares.